What's the answer for this question

Which composition of water moves to begin a deepwater current?

Acharge q experiences no net force at a particular point in space. which of the following situations described below must always be true? -there are no other charges nearby. -if there are other charges nearby, they must all have the same sign as q. -if there are other charges nearby, they must all have the opposite sign of q. -if there are other charges nearby, the total positive charge must equal the total negative charge. -none of the above

A200 g lead frying pan gains 2000 joules of heat. what is the change in temperature